File->Open pops up a modal 'open files' dialog

The File->Open dialog lets the user choose one or more files which are
opened in tabs in a new window; it replaces the behaviour where
File->Open presented a sheet which opened (at most) one file in the
topmost window.  This conforms better with the standard File->Open
behaviour of Mac apps.

src/MacVim/Actions.plist

@@ -6,6 +6,8 @@
 	<string></string>
 	<key>arrangeInFront:</key>
 	<string></string>
+	<key>fileOpen:</key>
+	<string></string>
 	<key>fontSizeDown:</key>
 	<string></string>
 	<key>fontSizeUp:</key>

src/MacVim/MMAppController.h

@@ -26,6 +26,7 @@
 - (void)removeVimController:(id)controller;
 - (void)windowControllerWillOpen:(MMWindowController *)windowController;
 - (IBAction)newWindow:(id)sender;
+- (IBAction)fileOpen:(id)sender;
 - (IBAction)selectNextWindow:(id)sender;
 - (IBAction)selectPreviousWindow:(id)sender;
 - (IBAction)fontSizeUp:(id)sender;

src/MacVim/MMAppController.m

@@ -429,6 +429,16 @@ - (IBAction)newWindow:(id)sender
     [self launchVimProcessWithArguments:nil];
 }
 
+- (IBAction)fileOpen:(id)sender
+{
+    NSOpenPanel *panel = [NSOpenPanel openPanel];
+    [panel setAllowsMultipleSelection:YES];
+
+    int result = [panel runModalForTypes:nil];
+    if (NSOKButton == result)
+        [self application:NSApp openFiles:[panel filenames]];
+}
+
 - (IBAction)selectNextWindow:(id)sender
 {
     unsigned i, count = [vimControllers count];

src/MacVim/gvimrc

@@ -36,13 +36,15 @@ endif
 " File menu
 
 aunmenu File.New
+aunmenu File.Open\.\.\.
 aunmenu File.Close
 aunmenu File.-SEP4-
 aunmenu File.Exit
 aunmenu File.Save-Exit
 
 an <silent> 10.290 File.New\ Window             :maca newWindow:<CR>
 an  10.295 File.New\ Tab                        :tabnew<CR>
+an <silent> 10.310 File.&Open\.\.\.             :maca fileOpen:<CR>
 an 10.328 File.-SEP0-                           <Nop>
 an <silent> 10.330 File.Close\ Window<Tab>:qa   :confirm qa<CR>
 an 10.331 File.Close<Tab>:q                     :confirm q<CR>